package com.share.common.utils;

import org.w3c.dom.Node;
import org.w3c.dom.NodeList;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import javax.xml.parsers.DocumentBuilder;
import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.OutputKeys;
import javax.xml.transform.Transformer;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.InputStream;
import java.io.StringWriter;
import java.util.HashMap;
import java.util.Map;


//  其他的xml转json  eg： org.json

/**
 * 使用JDK自带的XML序列化与反序列化功能实现的XML 与 JavaBean之间的转换<br>
 * 请使用注解：@XmlRootElement、@XmlAttribute、@XmlElement<br>
 *
 * @author LiZW
 */
public class XmlUtil {

    /**
     * 入参数 java对象 并且java对象还要使用注解,否则报错
     * <p>
     * java对象转为XML
     */
    public static String javaObject2Xml(Object javaObject) throws Exception {
        JAXBContext context = JAXBContext.newInstance(javaObject.getClass());
        Marshaller marshaller = context.createMarshaller();
        marshaller.setProperty(Marshaller.JAXB_ENCODING, "UTF-8"); // 编码格式
        marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true); // 格式化XML
        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
        marshaller.marshal(javaObject, outputStream);
        return outputStream.toString("UTF-8");
    }

    /**
     * 输出的java对象要使用注解,否则报错
     * <p>
     * XML转为java对象
     */
    @SuppressWarnings("unchecked")
    public static <T> T Xml2JavaObject(Class<T> cls, String strXML) throws Exception {
        JAXBContext context = JAXBContext.newInstance(cls);
        Unmarshaller unMarshaller = context.createUnmarshaller();
        ByteArrayInputStream inputStream = new ByteArrayInputStream(strXML.getBytes("UTF-8"));
        return (T) unMarshaller.unmarshal(inputStream);
    }

    /**
     * XML格式字符串转换为Map
     * <p>
     * 备注：  只支持 一层转换
     *
     * @param strXML XML字符串
     * @return XML数据转换后的Map
     * @throws Exception
     */
    public static Map<String, String> xml2Map(String strXML) throws Exception {
        try {
            Map<String, String> data = new HashMap<String, String>();
            DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
            DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
            InputStream stream = new ByteArrayInputStream(strXML.getBytes("UTF-8"));
            org.w3c.dom.Document doc = documentBuilder.parse(stream);
            doc.getDocumentElement().normalize();
            NodeList nodeList = doc.getDocumentElement().getChildNodes();
            for (int idx = 0; idx < nodeList.getLength(); ++idx) {
                Node node = nodeList.item(idx);
                if (node.getNodeType() == Node.ELEMENT_NODE) {
                    org.w3c.dom.Element element = (org.w3c.dom.Element) node;
                    data.put(element.getNodeName(), element.getTextContent());
                }
            }
            try {
                stream.close();
            } catch (Exception ex) {
                // do nothing
            }
            return data;
        } catch (Exception ex) {
            throw ex;
        }
    }

    /**
     * 将Map转换为XML格式的字符串
     *
     * <p>
     * 备注：  只支持 一层转换
     *
     * @param data Map类型数据
     * @return XML格式的字符串
     * @throws Exception
     */
    public static String map2Xml(Map<String, String> data) throws Exception {
        DocumentBuilderFactory documentBuilderFactory = DocumentBuilderFactory.newInstance();
        DocumentBuilder documentBuilder = documentBuilderFactory.newDocumentBuilder();
        org.w3c.dom.Document document = documentBuilder.newDocument();
        org.w3c.dom.Element root = document.createElement("xml");
        document.appendChild(root);
        for (String key : data.keySet()) {
            String value = data.get(key);
            if (value == null) {
                value = "";
            }
            value = value.trim();
            org.w3c.dom.Element filed = document.createElement(key);
            filed.appendChild(document.createTextNode(value));
            root.appendChild(filed);
        }
        TransformerFactory tf = TransformerFactory.newInstance();
        Transformer transformer = tf.newTransformer();
        DOMSource source = new DOMSource(document);
        transformer.setOutputProperty(OutputKeys.ENCODING, "UTF-8");
        transformer.setOutputProperty(OutputKeys.INDENT, "yes");
        StringWriter writer = new StringWriter();
        StreamResult result = new StreamResult(writer);
        transformer.transform(source, result);
        String output = writer.getBuffer().toString(); //.replaceAll("\n|\r", "");
        try {
            writer.close();
        } catch (Exception ex) {
        }
        return output;
    }
}
